Triple roll crusher



Sept. 22, 1959 R. 1.. F YE TRIPLE ROLL CRUSHER Filed April 12, 1957 2 Sheets-Sheet 1 lfi FIG. 1

' INVENTOR. Pan/Aw L. F YE FIG. 2

Arron/am Sept. 22, 1959 R. L. FYE

TRIPLE ROLL CRUSHER 2 Sheets-Sheet 2 Filed April 12, 1957 FIG.4

INVENTOR. Pan/Aw L. F YE 1477' ORA/E Y U itd 68 P en TRIPLE ROLL CRUSHER Ronald L. Fye, Hollidaysburg, Pa., assignor to McLanahan & Stone Corporation, Hollidaysburg, Pa., a corporation of Pennsylvania Application April 12, 1957, Serial No. 652,434

2 Claims. (Cl. 241-37) This invention relates to a crusher, and more particularly and specifically to a two-stage crusher which embodies three rolls and a single crushing or crusher plate.

The crusher was conceived primarily to reduce run-ofmine coal to stoker size in a single machine, but it will be obvious that the crusher could be utilized for other specific purposes.

The primary object of the invention is the provision of a crusher which can receive run-of-mine coal and reduce it to stoker size in a single operation.

Heretofore it has generally been the practice to utilize two machines, one of which is capable of taking a large size feed, such as run-of-mine coal, and then utilizing a second machine, incapable of taking a large size feed, and crushing and reducing to stoker size the product discharged from the first machine. With such a setup two machines are necessary whereas with the present invention the final desired size product is obtained with a single machine which has the advantage of utilizing lesser space than has heretofore been necessary by the use of two machines and has the further advantage of utilizing only one driving power means, such as a motor, whereas with two machines two separate drives have been necessary.

Heretofore where two machines have been utilized in reducing run-of-mine coal to stoker size a single roll machine in combination with a crusher plate has been utilized and the product of this machine has been fed to a double roll crusher which did not have the ability to initially receive a large size feed such as that of run-ofmine coal. The present machine embodies both a single roll crusher in combination with a crusher plate and a double roll crusher which crushes the reduced sized product of a single roll crusher. The present machine therefore has in a single machine all of the capabilities of two separate-crushing machines in reducing run-of-mine coal to stoker size.

Another object of the invention is the provision of power operated means to adjust one of the rolls of the double roll crusher toward the other roll thereof to selectively adjust the space between the rolls and to also provide automatic means to permit said removable roll to move away from the other roll shouldtramp orother foreign matter enter between the rolls and exert an excessive pressure on the rolls.

Advantages and improvements of the crusher over crushers as heretofore known and used will become readily apparent to those familiar with this art from the following description when read in the light of the accompanying drawings.

In the drawings:

Fig. l is a top plan view of the machine.

Fig. 2 is a side view of one side of the machine.

Fig. 3 is a side view of the opposite side of the machine.

Fig. 4 is a view in end elevational of the machine.

The machine is supported upon a base frame A and at its top is provided with a hopper B having an open upper end 1 into which is fed run-of-mine coal. Interiorly the hopper is provided with a crusher roll C carrying on its outer face a plurality of teeth 2. This roll operates cooperatively to crush the product between itself and a crushing plate D positioned at one side of the roll and hingedly supported on a shaft 3. The removable and renewable crushing tip 4 carried on the inner face of the plate adjacent its lower end is adjustable toward and away from the roll through the instrumentality of the adjusting arm 5. The shaft 6 upon which the roll is mounted and by which it is rotated is provided with an extension 7 which extends outwardly beyond one side of the machine and carries a sprocket 8 which is operatively connected to the drive, as will be hereinafter described.

The hopper at its lower end is provided with a supporting frame E which not only supports the hopper but also is a foundation for the bearings 9 and 941 at the opposite sides of the hopper within which the roll shaft is trotatably supported.

The hopper supporting frame E is mounted on the upper end of a housing F which in turn rests upon and is supported by the main heretofore mentioned base frame A.

A pair of bottom rolls G and H are disposed within the housing F and extend in spaced parallel relationship throughout the length of said housing and receive between them the crushed product falling downwardly from the hopper B. The roll G is rotatable with its supporting shaft 10 which shaft is rotatably supported at its ends in the fixed bearings 11. The shaft 12 of the other crusher roll H is supported at its ends in sliding bearings 13. The bearings 13 are slidable transverse the machine in guideways positioned at each end of the machine. The top 14 of the base A forms the bottom and the bar 15 forms the top of each guideway.

Means are provided for adjustably positioning the roll H in respect to the roll G. This is in the form of a shaft 16 extending transverse one end of the machine and provided at each of its ends with a pair of arms which are designated 17 and 18. At its upper end each of the arms has pivotally connected thereto as at 19, see Fig. 2, a pair of bars 20 and 204: the opposite ends of which are pivotally connected as at 21 to their respective bearing 13.

The sliding bearings provide a means by which the crusher roll can be moved toward and away from the crusher roll G to control the size of the passageway between the rolls so as to selectively size the product which is discharged from these rolls. This adjustment of the rolls is accomplished by oscillation of the shaft 16. Intermediate its length this shaft is provided with a crank arm 22 to which is pivotally attached as at 23 the extending end 24 of a piston, not shown, within the hydraulic cylinder S which is pivotally supported on the machine as at 25. A hydraulic pump and reservoir T is provided with a manually operable pump handle 26. This reservoir is connected to the top of the cylinder by a pipe line 27 having therein a check valve 28. A second pipe line 29 has oneend connected to the pipe line 27 at a point intermediate its ends as at 30. This pipe line is provided with a pressure relief valve 31. A bypass pipe line 32 bypasses the pressure relief valve and is provided with a manually operable valve 33. The shaft 16 is provided with a second crank arm 34 to which is attached the lower end of a coil spring 35 the upper end of which is anchored to the machine housing as at 36.

With the above construction it will be understood that the tension of the spring 35 normally tends to keep the piston within the cylinder in a retracted position when there is no hydraulic pressure in the cylinder. When it is desired to adjust the space between the rolls the valve 33 is closed and then the pump handle 26 is operated which will cause oil to be pumped through the check valve 28 into the cylinder above the piston therein. This pressure will force the piston outwardly or downvrenamed Sept. 22, 1959 3 wardly and through its connection with the crank arm 22 of the shaft 16 the shaft will be caused to oscillate and through its linkage with the movable bearings 13 will move these bearings inwardly and move the crusher roll H toward the crusher roll G; The oil in the cylinder is under pressure only when coal or Whatever material is passing between the rolls is of a size to cause the rolls to be pushed apart. In the event tramp iron or some foreign substance which is not crushable should find its way between the rolls and exert an excessive pressure on the rolls, the movable roll will be permitted to move away from the stationary roll because this pressure will open the relief valve 31 and allow oil within the cylinder and above .the piston to return to the reservoir T through the pipe line 29. To reset the positions of the rolls should the above occur, it is necessary only to again pump oil into the cylinder. With the rolls in a set position the space between them can be increased .merely by opening the valve 33 and permit oil Within the cylinder and above the piston to bypass the relief valve and return to the reservoir through the pipe line 32. When therolls have reached their desired setting, further movement ,of

them in respect to one another is stopped by closing the a valve 33.

From the foregoing it will be seen that a definite and eificient hydraulic means is provided for adjusting one of the lower crusher rolls in respect to the other and The operation of the machine will be understood from the foregoing and needs no specific description. It is to be noted, however, that a single roll crusher in combination with a crusher plate, although it has the advantage of being able to work a large sized product, is not a good machine for producing small sized product and that a double roll crusher cannot take .a large sized product but is very eflicient in producing a-small size or fine product. It will be seen, therefore, that the present device provides in a single machine :the desirable attributes of both a single and a double roll crusher.

What I claim is:

1. A two-stage crusher for handling run-of-mine coal or a similar product comprising, a crusher having therein that additionally this mechanism provides safety against injury to the rolls by permitting the movable roll to move away from the stationary roll in the event excessive pressure is exerted upon the rolls by reason of a non crushable material finding its way to the space between the rolls.

The main drive for all of the crushing rolls is through a the shaft 10 of the lower roll G to the extension 10a of which is secured a driving pulley I while the other end of the shaft -is provided with a sprocket The shaft 12 of the crusher roll H is provided with a sprocket L of similar size to the sprocket K. Theshaft 7 of the upper crusher .roll C is provided with a sprocket M of a diameter intermediate the sizes of the pulley J and the sprockets K and L. An idler sprocket N is rotatable on the shaft 26. All the sprockets K, L, M and idler sprocket N are at the same end of the machine and are protected by a suitable housing P. A drive chain Q interconnects all the sprockets in the manner illustrated in Fig. 3, which incidentally also illustrates in dotted lines the adjustable positions of the lower crusher roll 5,;

H. In this figure of the drawing it will :also be seen that an automatic chain take-up or .tensioner is provided. This device for-ms no specific part of the present invention and is designated as an entirety bylR and .can be of any conventionaland well known construction.

The pulley] is of course connected with any suitable source of power means such as .a motor and rotation of the pulley I will result in rotation of all of the crusher rolls .at the desired speeds, which speeds areobtained by providing sprockets of the proper diameters. ally the rolls are rotated in the direction indicated 'by arrows in Fig. 2 of the drawings wherein it will be seen that the rolls G and H rotatein opposite directions.

Additiona rotatable crusher roll, a crusher plate at one side and adjustable towards and away from the roll, a pair of rotatable crusher rolls beneath the hopper and positioned to receive between thorn-the product leaving the hopper,

said crusher rolls being disposed in aligned parallel relationship, one of said rolls being supported in slidable bearings, one each of said .slidable bearings being positioned at each end of the crusher,- an oscillatable shaft extending across that end ofthe crusher adjacent to :that

roll which is supported in said slidable bearings, a hydraulic cylinder having a'piston therein with an extending piston rod, said rod being attached to said shaft for oscillating the same in response to themovement of the piston, .a spring interconnecting said shaft and said crusher in biased opposition to said piston, an arm fixed to saidyshaft adjacent each end thereof, a bar pivotally connected to each of said arms, and each of said bars having pivotal connection with one of said slidable bearings, a source of hydraulic pressure supply, and a conduit connecting said, pressure supply to the hydraulic cylinderat a point above :the piston therein, the parts operating as and for the purpose described.

2. A construction as defined in .claim 1 wherein, a pressure release valve is positioned in the conduit interconnecting the hydraulic pressure supply and the hydraulic cylinder, and said pressure release valve automatically acting to bleed the cylinder of hydraulic pressure and permit .the movable roll to move away from the stationary roll under bias of said spring in the event of an excessive pressure being exerted upon the rolls by the passage of material between the rolls.

References Cited inthe file of this .patent UNITED STATES PATENTS 

